Log Message:
youtube-dl: Update to 20200920

Changes:
20200920
--------
Core
* [extractor/common] Relax interaction count extraction in _json_ld
+ [extractor/common] Extract author as uploader for VideoObject in _json_ld
* [downloader/hls] Fix incorrect end byte in Range HTTP header for
  media segments with EXT-X-BYTERANGE (#14748, #24512)
* [extractor/common] Handle ssl.CertificateError in _request_webpage (#26601)
* [downloader/http] Improve timeout detection when reading block of data
  (#10935)
* [downloader/http] Retry download when urlopen times out (#10935, #26603)

Extractors
* [redtube] Extend URL regular expression (#26506)
* [twitch] Refactor
* [twitch:stream] Switch to GraphQL and fix reruns (#26535)
+ [telequebec] Add support for brightcove videos (#25833)
* [pornhub] Extract metadata from JSON-LD (#26614)
* [pornhub] Fix view count extraction (#26621, #26614)